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Revision History for A320447

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A320447

n such that all n - p are prime where p is prime in range n/2 <= p < n.
(history; published version)

#46 by N. J. A. Sloane at Sat Dec 22 16:27:38 EST 2018

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proposed

approved

#45 by Frank M Jackson at Thu Dec 20 04:43:18 EST 2018

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editing

proposed

#44 by Frank M Jackson at Thu Dec 20 04:08:54 EST 2018

EXAMPLE

a(5)=36, because the primes in the range 18 <= p < 36 are {19, 23, 29, 31}. Also the complementary set {17, 13, 7, 5} have has all its members prime. This is the 5th occurrence of such a number.

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proposed

editing

#43 by Frank M Jackson at Thu Dec 20 04:01:09 EST 2018

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editing

proposed

#42 by Frank M Jackson at Thu Dec 20 04:00:43 EST 2018

COMMENTS

The following is a quotation from Hage-Hassan in his paper (see Link below): "The (concept of) right and left symmetry is fundamental in physics. This incite incites us to ask whether this symmetry is in (the) primes. Find the numbers n with a + a' = n. a, a' are primes and {a} are all the primes with: n/2 <= a < n , and n = 2,3, ...".

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proposed

editing

#41 by Frank M Jackson at Thu Dec 20 03:48:53 EST 2018

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editing

proposed

#40 by Frank M Jackson at Thu Dec 20 03:46:51 EST 2018

COMMENTS

The following is a quotation from Hage-Hassan in his paper (see Link below): "The (concept of) right and left symmetry is fundamental in physics. This incite us to ask whether this symmetry is in (the) primes. Find the numbers n with a + ā a' = n. a, ā a' are primes and {a} are all the primes with: n/2 ≤ <= a < n , and n = 2,3, ...".

EXAMPLE

a(5)=36, because the primes in the range 18 <= p < 36 are {19, 23, 29, 31} and . Also the complementary set {17, 13, 7, 5} are have all its members prime. This is the 5th occurrence of such a number.

STATUS

proposed

editing

Discussion

Thu Dec 20

03:48

Frank M Jackson: Have removed non ASCII characters in comment.

#39 by Joerg Arndt at Thu Dec 20 03:26:48 EST 2018

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editing

proposed

#38 by Joerg Arndt at Thu Dec 20 03:26:32 EST 2018

LINKS

Mehdi Hage-Hassan, <a href="https://hal.archives-ouvertes.fr/hal-00879586/document"> An elementary introduction to Quantum mechanic</a>, hal-00879586 2013 pp 58.

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proposed

editing

#37 by Frank M Jackson at Tue Dec 18 10:25:02 EST 2018

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editing

proposed